20346321222361 has 4 divisors (see below), whose sum is σ = 20365717144500. Its totient is φ = 20326925300224.

The previous prime is 20346321222347. The next prime is 20346321222401. The reversal of 20346321222361 is 16322212364302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11414471717961 + 8931849504400 = 3378531^2 + 2988620^2 .

It is a cyclic number.

It is not a de Polignac number, because 20346321222361 - 2¹⁹ = 20346320698073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20346321222361.

It is not an unprimeable number, because it can be changed into a prime (20346321220361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9697959496 + ... + 9697961593.

It is an arithmetic number, because the mean of its divisors is an integer number (5091429286125).

Almost surely, 2^{20346321222361} is an apocalyptic number.

It is an amenable number.

20346321222361 is a deficient number, since it is larger than the sum of its proper divisors (19395922139).

20346321222361 is a wasteful number, since it uses less digits than its factorization.

20346321222361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19395922138.

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 20346321222361 its reverse (16322212364302), we get a palindrome (36668533586663).

The spelling of 20346321222361 in words is "twenty trillion, three hundred forty-six billion, three hundred twenty-one million, two hundred twenty-two thousand, three hundred sixty-one".